H. Lejeune, ELEMENTARY PAIRS OF PSEUDO-FINITE FIELDS - COUNTING COMPLETIONS, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 326(6), 1998, pp. 657-660
Let Pi be a complete theory of pseudo-finite fields. In this Note we p
rove that, in the langage of fields to which we add a unary predicate
for a substructure, the theory of non-trivial elementary pairs of mode
ls of Pi has 2(aleph 0) completions, that is, the maximum that could e
xist. For a more detailed presentation, see [5]. (C) Academic des Scie
nces/Elsevier, Paris.